Hansen’s bacillus is cultured in
**Question:** Hansen's bacillus is cultured in
A. Löwenstein-Jensen medium
B. Schaedler's medium
C. Oslowski's medium
D. Cornmeal agar
**Core Concept:** Hansen's disease, also known as leprosy, is a chronic granulomatous infectious disease caused by the bacterium Mycobacterium leprae and M. leprae's variant M. lepromatosis. These mycobacteria are slow-growing, acid-fast bacilli that require specific culture conditions to grow and be detected.
**Why the Correct Answer is Right:** Hansen's bacillus is cultured in Löwenstein-Jensen medium (A) because it provides essential nutrients and allows for optimal growth of the slow-growing mycobacteria. This medium is prepared by mixing sterile sand or bone ash with sterile glycerol-albumin-dextrose-catalase agar (GADC) and then adding glycerol and albumin.
**Why Each Wrong Option is Incorrect:**
B. Schaedler's medium (B) is used for culturing fast-growing mycobacteria, such as Mycobacterium tuberculosis, which is not relevant for culturing Hansen's bacillus.
C. Oslowski's medium (C) is an older and less commonly used culture medium for mycobacteria culturing. It is not specifically designed for culturing Hansen's bacillus.
D. Cornmeal agar (D) is primarily used for culturing fungi and yeasts, not Mycobacterium leprae.
**Clinical Pearl:** The correct culture medium for Mycobacterium leprae ensures accurate diagnosis and treatment of Hansen's disease. Other media may lead to misdiagnosis or failure to detect the disease. Adequate knowledge of culture media is essential in clinical microbiology for accurate diagnosis of infectious diseases.